Legendary investor Warren Buffett advises to be fearful when others are greedy, and be greedy when others are fearful. One way we can try to measure the level of fear in a given stock is through a technical analysis indicator called the Relative Strength Index, or RSI, which measures momentum on a scale of zero to 100. A stock is considered to be oversold if the RSI reading falls below 30.

传奇投资者沃伦·巴菲特（Warren Buffett）建议，在他人贪婪时要恐惧，在他人恐惧时要贪婪。我们可以使用一种称为相对强度指数（RSI）的技术分析指标来衡量给定股票的恐惧程度的一种方法，该指标以0到100的量度来衡量动量。 RSI读数低于30。

In trading on Friday, shares of Parsons Corp (Symbol: PSN) entered into oversold territory, hitting an RSI reading of 29.1, after changing hands as low as $34.63 per share. By comparison, the current RSI reading of the S&P 500 ETF (SPY) is 46.8. A bullish investor could look at PSN's 29.1 RSI reading today as a sign that the recent heavy selling is in the process of exhausting itself, and begin to look for entry point opportunities on the buy side. The chart below shows the one year performance of PSN shares:

在周五的交易中，帕森斯公司（股票代号：PSN）进入超卖区域，RSI读数达到29.1，此前交易价格低至每股34.63美元。相比之下，标准普尔500 ETF（SPY）当前的RSI读数为46.8。看涨的投资者可能会将PSN今日的29.1 RSI读数视为标志着近期的抛售正在耗尽自身的迹象，并开始在买方向寻找入场机会。下图显示了PSN股票的一年表现：

Looking at the chart above, PSN's low point in its 52 week range is $24.67 per share, with $45.40 as the 52 week high point — that compares with a last trade of $34.16.

从上图可以看出，PSN在其52周范围内的最低点是每股24.67美元，其中52.40美元是45.40美元的最高点，而上一交易日的价格为34.16美元。